April 2017 in “Journal of Investigative Dermatology” This study identified the dermal sheath as a key component of the hair follicle niche, essential for outer root sheath regression during the hair cycle, highlighting its importance in hair follicle support and regulation.
November 2025 in “Journal of Investigative Dermatology” Estetrol may help prevent hair loss and support hair growth in women.
81 citations
,
January 2006 in “Journal of cellular physiology” This study found that the absence of the vitamin D receptor disrupts hair follicle structure during the first catagen in mice, linked to increased expression of the hairless gene.
20 citations
,
January 2022 in “Oxidative Medicine and Cellular Longevity” This study found that intrinsic reactive oxygen species drive the hair follicle cycle progression through DNA damage and repair, apoptosis, and macrophage polarization, influencing hair loss and regeneration dynamics in mice.
1 citations
,
September 2023 in “Life science alliance” In this study, researchers observed that Vdr-knockout mice experience hair cycle arrest during the catagen stage, leading to alopecia, with persistent epithelial strands forming in the hair follicles, indicating Vitamin D receptor's role in regulating hair follicle regression and regeneration.